Cutter-bar.



y .Tl'allj'whom may concern.'

prometieron ,on nassacnusnrrs.

Beit known that we,`JoHN H. Poor.n,'of

` Brockton, ,in the 4county of Plymouth and 7 State of'li/Iassacliusetts, and ALrRnD' D. AB- 5 V:inNzi'srrlrna bfRandolph, in the county of Norfolk of "Massachusetts, have inventedicertain new and usefullmprovements in CutterfBars, of which the following "Th's inventin "relates to a reciprocating cutter bar for a mowingfmachine, the ,cutter bar-being provided 'with a series of knives which; cooperate with' fixed fingers r carried by a. fingerbar on which the.' cutter b ar reciprocates.' t 1 The invention has for its objectto provide an improved construction of a cutter bar and its yknives' whereby' the knives may be simultaneously 'locked tothe cutter bar and simultaneouslyreleased, so that any knife may be removed to be sharpened or replaced by another wwith the minimum expenditure of-time of the cutter bar and, knives.

.sents a bottom plan view of the cutter bar d The invention consists inthe improvements" which we will'now proceedv to describe andclalm.

O f-the accompanying drawings, forming. a part of this specification,-Figure 1- represents a top plan view of a cutter' barand a series of knivesfembodying oury invention. Fig. 2 re resentsyatsection on line 22 of Fig. 1. iig; 3f represents a front edge view Fig. trepreand knives shown in Fig. 1. Fig. 5 represents asection on line 5--5 of Fig. 4. Fig. 6 .represents a perspectivevi'ew showing a portin of the kcutter bar inverted, the knifelocking Imeans being removed. Fig.4 7 represents a viewtsimilar` to Fig. 6, showing the knife-'locking means in place. Fig.4 8 represents a section on line 8 8 of Fig. 4c. Fig. 9

represents a section on line9-9 of Fig.` 3.

Fig. 10 represen-usanY end elevation of the cutter bar. Fig. 11 represents a plan View of one of thek'nives detached.

q v The same reference characters indicate the vI same parts in all the figures.

In the .drawings- 12' represetsa cutter barwhich is here shown as rectangular in cross section, and havinL continuousat u pper andlower sides, the atter being adapted to slide as usual in contact with the finger Ep sfrnfrns narnnron,

. CUTTER-BAR.' v

H `specificatiomof Letters Patent.

oHusErT' 'A ssrenoas, BY Dinner `ein) MEsNEfassrGNMnNrs, 'roinnocirfroiv'avrow- Patented Jaiyec, 19in.

'Appncatioamed Jnefaieoa'seramo. 501,059.

iite'iu'acriinnfcurrna een contrarre', or. isnocnfron,1,dnassnornusnrfrs;fauconT f bar of al mowing machine. 'We have not 4shown the means for reciprocating the ,cutter bar, and it will beunderstood that these may be of the usual or any suitable character. @wing to the upper andlower sides of the cutter' bar 12 being flat and continuous, `the said bar is adapted to slide in the usual man- `ner in contact with thefiinger bar of ainow-4 fingers of theusual fingerl bar in cutting standing grass. Each knife isprovided with a shankv 16' formed toenter vand snugly iit one ofthe slots 13, the Shanks being preferably so proportionedl relatively to the width of the cutter bar that when 'the knives are in position.the rear ends of: the'shanks project from the rear edge of t-her cutter `bar as shown 1nthe drawings, so that when thev knives are released or unlockedlany knife.

may be removed by tapping the rear end of its shank with a hammer, provision being thus made for convenientlydislodging and' removing the knives and overcoming any Vdifficulties ,that may attend such' remova1vowing to rust or corrosion of the contacting surfaces of the slotsl' and Shanks 16..`

. The cutter bar; is Vprovided with'fa series of locking .tongues'l which are forfmed on.

a bar V18. Said bar is pivoted at 19 tothe,y cutter bar 12v at the rear vertical edge thereof, the arrangement `being such that when the bar 18 'is swung on its pivot, it movesto and from .a position along the edgeof the lcutter bardlQ-land the'tongues 17 are moved'V crosswise of thewfplane of `the 'series` of slots 13. Whenthe'locking bar 18 is in its closed position' alongside` the cutter'bar 12, the

locking tongues '17 project across portions of the slots 13 and engage shoulders formed on the knife Shanks 16, thus locking the 'knives in place. When the locking bar '18 is dis-v placed,'as indicated by dotted lines in Fig. i'

8, the'tonguets 17 are withdrawn simulta' neously 'from .engagement with the knife'v4 vtaneously released, so that each being therefore y simulis free vto be Shanks, the knives ejected fromt e cutter bar.

The knife Shanks 16 ,are provided with shoulders vformed to engage the locking tongues 17, the'preferred formation being that shown y portA of in -Fi .`11,the tonUue-en in Shoulders being die' vs ides 20 aiid 21 afgreg cesses' formed in theA opposite edges of the knifeshanks 16.-"Sai recesses are formed to receive portions of the locking tongues 17, as indicated in Figs. 6, 8*,'and 9.

It will bef seen that whenthelocking operative position, they prevent eitherforward mentof theknives, and that when they are removed from-.their operative position, they knives." Thearrangementfhere shown is such that each space bes o that tongue '71s instrumental in -lockingi two The close sliding iitof theshanks in the slots 13 insures a firm supthe kn any direction excepting len locking tongues and shou lengthwisedisplacement of the .knives when 'Ocking tongue is .movable liny a hwise. The

the locking tongues are in place.4

in Figs. 4, 5', 6,Y

kIt will be understood that 7, and 8,the cutter bar is shown inverted.

Whenthe cutter bar is in its operativev posi- -t1on,1.the ,knife shanksare above the locking bar 18the tongues 17 being movable downwardaly outy of engagement withthe knife Shanks. y v

In Fig. 1`0, we Show the swinging end of the looking 'bar 18 provided with a notch 22 adapted to receive a spring 1atch'23'which is secured to. ter bar, said latch;A being adapted, to securey the locking bar in its operative position."

and-*limit the rearward movement of.

an arm 2flattached to the cut- We provide the base of each knife with outwardly proJecting Shoulders 25 adapted to bear on. the front side of the. cutter baltlr,

' t e knife yShanks into the-cutter bar, so that. the knives are rigidly supported bythe vcutter bar agalnst rearward displacement, and are .prevented from exerting lpressure on the locking bar tending tospring the same rearwardly. The inner sides 21 of the recesses in the knife Shanks do not necessarily bear upon the'locking tongues, lso that the'recesses in the Shanks may be of considerably greater lwidth than the lthickness of the locking vstructure includes the shoul braced in our or4 backward move- `plane ives against displacement inders prevent ved to engage the 4Shanks being sep intermediatespaces, 'and' a locking 'hinged to the -cutter bar and provide 'ng tongues'fmovable cross' cutter bar.

We do not claim herein the structure of the cut-ter bar described exce ting where the ers at'the Sides of the knife Shanks, which shoulders are enaged by' the tongues of th'e locking bar. lailns' not limited to Such shoulders are em-l application Serial No. 523,385, filed October- 19, 1909. I

e claim :V 1. A cuttervbar having a series of trans- -verse slots open at the frontside of the bar, .a seriesof knives having Shanks formed to enter said lslots, and provided with tongueengaging Shoulders, andI a series, of connected locking tongues movable crosswise of the ofthe series of Slots and adapted'to engage said Shoulders.-"

- 2. A cutter bar' having a'lseri'es-of tranS-' verse 4slots open at the front side ofthe bar, a series of knives' having Shanks formed to enter said slots, and shoulders .formed to bear on the front side of the. cutter bar and limit the rearward movement of'- the knife Shanks into the slots, and a series -of connected llocking tonguesmovable crosswise of the lane of thel'series of slots, the said Shan rs being provided with' shoulders adaptlocki'n tongues to-'prevent forward movement of t e ,knives out ofthe slots. y'

3. A cutter bar having .a series of trans'- verse slots open at the front SideI of the bar', a series of knives having Shanks formed to enter said Slots, said Shanks havingr recesses which form tongue-engaging vshou ders, the arated from'each other by :bar with a series of locki wise of the sltsand arrangedtoentersaid spaces and recesses, each tongue beingadapted to engage shoulders on two adjacent knife Shanks. f In testimony whereof-'we have a-iixed our` signatures, in presence of two witnesses.

:JOHN H. POOLE. l ALFRED-D. ABBENZELLER.

I lVVitnesSes C. RBRQWN, i I P. W. PEzaETTI. 

